Oven



Dec. 15, 1931. G. D. WILKINSON I OVEN Filed Nov. 21, 1928 3 ShGEtS-Sht 2 Dec. 15, 1931. G w so 1,836,888

OVEN Filed Nov. 21, 1928 5 Sheets-Sheet 3 Patented Dec. 15, 1931 V UNITED "STATES PATENT OFFICE GEORGE D. WILKINSON, OF'CHIOAGO, ILLINOIS, ASSIGNOR 'IO CRIBBEN & SEXTON COM- PANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS oven 1 Application filed November 21, 1928. Serial No. 320,844.

This invention relates to a novel type of oven construction which may be embodied in the ordinary electric, gas or oil range. The invention particularly resides in the provision of a novel type of oven insulation lining which is adapted to be employed in the standard type of stoves which are now built on a continuous assembly line.

Heretofore it has been customary to fill the open space between the outer oven walls and the oven lining with shredded asbestos or fiber wool packing which serves as an insulating medium. Such construction presents numerous disadvantages, the chief one of which is that it is very difiicult to remove and replace the insulation lining, in renewing rusted, worn or broken parts. Ina stove constructed in accordance with the present invention, the insulation lining is in the form of suitable insulation panels. which may be removed and replaced readily, so that all parts are accessible.

The invention will be understood from the following description, together'with the ac- 5 companying drawings, in which Figure 1 is a broken elevational view showing the oven in combination with a gas range; Fig. 2, an enlarged horizontal section taken on the l.ine22 of Fig. 1; Fig. 3, an enlarged vertical section taken on the line 33 of Fig. 2; Fig. 4, a broken vertical section taken on the line 4-4 of Fig. 3; Fig. 5, a perspective view of one of the insulation panels employed'; and Figs. 6 and 7, details of two different types of insulation material that may be used.

Referring to the drawings,1 represents an oven unit comprising a baking-oven 2 and a broiler-oven 3 positioned below the baking oven. A'perimetral base frame 10 extends around the stove body'and affords the base for supporting the oven body. The oven body is made up of an outer shell formed. by the side walls 11 and 12, the rear-wall 18, and the top wall 14. Thefrontof the oven consists of a perimetral cast metal member 4 and the oven doors 5 and 6. The member 4 is bolted along its lower edge to frame 10, and has its lateral edges turned rearwardly at 7 to form a smooth continuous junction with the side walls. Member 4 is shouldered at 9 to afford support for the top wall 14, and is provided along its lateral edges with tapped lugs 8 to permit the side walls 11 and 12 to be secured thereto.

The upper and lower horizontal edges of the side walls 11 and 12 are offset inwardly to provide a shoulder which engages the perimetral band 10 along the lower edge and the downturned portion of the top member 14, as shown in Fig. 3. The top wall 14, as shown in Fig. 4, is provided along its front and rear edges with downturned flanges, the

front flange engaging the shoulder 9 on the perimetral member 4, and therear flange engaging the rear wall 13. Therear wall 13 is provided with a gas vent 15 which serves as a means for conducting away the heated gases. The vent is preferably in the form of a trap which serves to catch any condensed moisture. ripheral frame member 10. A panel 16 is carried by the top portion-0f rear wall 13 and extends across the entire back of the stove.

The baking oven door 5 is formed, as shown in Fig. 2, from an outer plate member 17 and an inner plate member 18, and is filled with insulating material, such as shredded asbestos or fibre wool 19. This door is pivotally mounted on the perimetral frame 1.

The broiler door 6 is secured'to the front wall of the broiler drawer which is preferably mounted upon an extensible track carried by the channel members 20, shown in section in Fig. 3.

A cooking top support frame 21 and a drip pan support 22 are secured to the inner side wall 12 and extend laterally from the oven body. Side angle bars .23, extending hori- The wall 13 is bolted to the pe-' zontally between the front and rear sides of the perimetral frame member 10, serve as a supporting means for the inner lining and insulation members now to be described.

Immediately below the top wall 14 is a top insulation panel 24, and immediately below the panel 24 is the top lining member 25. The top liner 25 is provided with a front opening 26 and a rear opening 27 through which the ascending heated gases may pass, and is also provided with a pair of battle flanges 28 which extend horizontally from the front toward the rear of the oven and afford a path which conducts the heated gases to the flue or vent 15.

The rear edge of the top liner 25 is offset downwardly at 29 to meet the portion of the rear wall 13 which is cut away to accommodate the flue 15. The top insulation panel 24 rests upon and is supported by the baffle bars 28 and the rear insulation panel 34. The top liner 25 is supported by the side liners 30 and 31 which in turn rest upon angle bars 23. The side insulation panels 32 and 33 are interposed between the side walls 11 and 12 and the side liners 31 and 30, respectively. These side insulation panels are also supported upon the angle members 23 and form an abutting contact on the upper edges with the top insulation plate 24, as shown in Fig. 3. The rear insulation panel 34 is interposed between the rear wall 13 and the rear liner 35, both the insulation panel and the lining being supported between the angle support members 23.

The side liners 30 and 31 are oifset inwardly along theirfront and rear vertical edges, as shown at 36. Between these offset portions, along each side of the oven, are secured horizontal grate support members 37. The baking oven bottom 38 is interposed between-these grate supports and serves as a partition separating the baking and broiler compartments. A spreader bar 39 positioued between an opposing pair of grate support members, and adjacent the rear lining, serves to hold the side liners in place.

Fig. 5 shows a perspective view of one of the insulation panels, it being understood that the exact size of the panel is made to correspond to the particular space which it is to occupy. The panel comprises the insulation sheets 40 and the sheet metal plate 41 which is provided with marginal inturned portions 42 extending across a pair of opposing edges, said portions serving to hold the insulation sheets 40 in place. Preferably the sheet metal plate, or holder, is formed of stainless steel which does not readily oxidize at high temperatures. from the plate to accommodate bolt heads. The sheet is preferably placed so that the metal face contacts with the adjacent lining, the unfaced portion of the insulation sheet being next to the outer stove wall. The inner One or more notches 43 are cut side insulation panel 33 is cut away to provide a space 44 through which the conduits leading to the thermostat 45 may pass. The rear insulation panel 34 and the rear liner 35 are also cut away to accommodate the flue outlet, as shown in Fig. 4.

It will be apparent that the removable panel type of insulation construction is readily adapted for commercial methods of stove assembly. The insulation and liner members may be readily built into the stove as the units pass along the assembly line. The rear insulation panel 34 is first placed in position, then the top insulation panel 24 is placed in position, whereupon the top liner 25 is inserted and holds the top insulation panel in position. The rear liner 35 can then be put in place. The side insulation panels 32 and 33 are then placed in position and the side liners 30 and 31 are then inserted and firmly retained against the side insulation panels by introducing the spreader bar 39. The baking oven bottom 38 serves as an additional brace between the side liner members. The insulation sheets may be removed by merely reversing these operations, all of the parts being taken apart with as little inconvenience as there is involved in the assembly operation.

In Figs. 6 and 7, there are shown two different forms of insulation panels, the form shown in Fig. 6 being somewhat more closely knit and compact than that shown in Eig. 7. Asbestos sheeting is very satisfactory; however, any suitable sheet insulating material may be used.

The oven walls and the lining members are formed of sheet metal, it being understood that the walls are fastened together by proper bolt connections. The top and side oven walls are enameled, and the liners are also enameled to prevent corrosion.

While I have shown the invention as applied to an oven unit containing a broiler compartment, it will be apparent that it may be embodied in an oven containing only a baking compartment. Alterations in the particular form of oven into which the new type of lining is introduced are to be viewed as fully within the scope of the invention. Also the'structural details of the stove body in general are to be viewed as merely illustrative of but one of many practical types of stove bodies now on the market, all of which may be readily equipped with the invention.

The foregoing detailed description has been given for olearness of understanding only and no unnecessary limitations should be understood therefrom, but the appended claims should be construed as broadly as permissible in view of the prior art.

What 1' regard as new, and desire to secure by Letters Patent, is:

1. An oven unit comprising, a horizontal base frame, a perimetral front frame member having rearwardly extending side flanges and an offset shoulder extending across the top edge, a door mounted on said front frame member, a rear wall secured to said base frame and provided with a vent,

side walls secured to and extending between said side flanges and said rear wall, a top wall having its front edge in engagement with said offset shoulder and its rear and side edges supported upon the rear and side walls, removable rear and side lining pieces spaced inwardly from the rear and side walls and supported upon said base frame, a

removable top lining piece spaced inwardly from the top wall and supported upon the side lining pieces, said top lining piece being provided with openings and baffle members extending toward said rear wall vent, and

removable insulation panels interposed between said lining pieces and said top, rear and side walls.

2. An insulating panel adapted for insertion between the outer wall and lining of an oven, comprising a sheet metal plate having marginal housing flanges and a plurality of insulating sheets mounted on said plate with their marginal edges clamped thereto by the marginal housing flanges of said plate.

3. An oven unit comprising: outer walls and a lining with spaces therebetween; and removable insulating panels mounted in said spaces, each comprising a sheet-metal plate having marginal housing flanges and a plurality of insulating sheets mounted on said plate with their marginal edge-portions clamped thereto by the marginal housing flanges of said plate.

4;. An oven unit comprising, a horizontal base frame, a front frame member having rearwardly extending side flanges and a shoulder extending across the top edge, a door for said front frame member, arear wall secured to said base frame, side walls secured to and extending between said side flanges and said rear wall, a top wall having its front edge in engagement with said shoulder and its rear and sidevedges supported upon the rear and side walls, rear and side lining pieces spaced inwardly from the rear and side walls and supported upon said base frame, a lining piece spaced inwardly from the top wall and supported upon the side lining pieces, and removable insulating panels interposed between said lining pieces and said top, rear and side walls.

5. An oven unit comprising, a horizontal base frame, a front frame member having rearwardly extending side flanges, a door for said front frame member, a rear wall secured to said base frame, side walls secured to and extending between said side flanges and said rear wall, a top wall extendingrearwardly I from said front frame and having its rear and side edges supported upon the rear and side walls, rear and side lining pieces spaced inwardly from the rear and side walls and supported upon said base frame, a linin piece spaced inwardly from the top wall and supported upon the side lining pieces, and removable insulation panels interposed between said lining pieces and said top, rear and side walls.

In witness whereof, I have hereunto set my hand this 16 da of Nov., 1928.

GEOR E D. WILKINSON. 

